Auxiliary grinder for mills



Dec. 1, 1936. S NG I 2,062,730

AUXILIARY GRINDER FOR MILLS Filed April 28, 1935 2 Sheets-Sheet 1 1Z3(\/6I\ 13 74 TES? I I I w x A- v W' INVENTOR. V GEORGE SCH/LL/N ATTORNEY.

Dec. 1, 1936. SCI-"LUNG 2,062,730

AUXILIARY GRINDER FOR MILLS Filed April 28, 1936 2 Sheets-Sheet i f i 33 0 p *5 mgi'w g INVENTOR. 28 H6 65056: Say/440m ATTORNEY.

Patented Dec. 1, 1936 UNITED STATES PATENT OFFICE AUXILIARY GRINDER FOB MILLS George Schilling, Cleveland, Ohio Application April 28, 1936, Serial No. 76,799 1 Claim- ((')L 83-22) This invention relates to auxiliary stationary grinders attachable to mills having a horizontal cylindrical grinding member and relates particularly to mills adaptable for grinding paints,

pigments, or other viscous materials.

A conventional paint mill of the type referred to consists of three rollers, two of which co-act as crushers and the third reciprocating roller serving as a grinding member. In such mills the material to be ground is fed to the crushing rollers at the top, carried through the nip around to the third roller where it is further ground and then removed for further processing.

An object of my invention is to provide a mill of the type referred, to with an auxiliary grinding member that is simple of construction, economical to manufacture, and with one which is easy to regulate, clean and adjust.

Another object of my invention is to provide 0 an auxiliary stationary grinder that will supplement or increase the efficiency of the grinding action of the grinding roller.

A further object of my invention is to provide an auxiliary grinder with a simple and eflicient cooling means.

A still further object of my invention is to provide an auxiliary fixed grinder with supporting armswhich automatically positions the grinder in relation to the reciprocating rotary grinder.

These and other features of my invention are more fully set forth hereinafter; reference being made to the accompanying drawings, in which:

Figure 1 is a side view of a mill with the auxiliary grinder attached thereto.

Figure 2 is an enlarged front view of the auxiliary grinder.

Figure 3 is a side view of the auxiliary grinder enlarged.

Figure 4 is a sectional view of the arm and.

4 block assembly taken along the lines IV--IV of Figure 3.

Figure 5 is a vertical cross-sectional view of the auxiliary grinding block taken along the lines V--V of Figure 2.

Figure 6 is a horizontal cross-sectional view of the auxiliary grinding block taken along the lines VI--VI of Figure 5.

In Figure 1 of the drawings I show a mill of the type to which my invention can be easily attached. This mill is of the horizontal roller type and has a base II, in which is mounted three steel cylindrical rollers i2, i3, and [4, re-

spectively. The rollers l2 and i3, revolve in- 5 wardly at the top and act as crushers of the material fed to them. The right-hand roller ll, co-acting with the middle roller l3, serves as a grinder. The middle roller I3, is usually sta-v tionary, but the end rollers l2 and M, are moveable outwardly by means of the screws Ii, to 5 facilitate cleaning, adjusting or repairing. The tension or pressure of the rollers is controlled by the springs l6, between them. Because of the heat that is generated by friction in the crushing and grinding process the rollers have 10 cooling means within them, and in the Figure 1, I show water pipes l1, leading to the rollers for this purpose. The character l8, indicates a scraper used to remove the material from the roller I4. 15

With reference to the foregoing my invention consists of a grinding block 20, which fits over the roller ill, the brackets 2i, mounted on the base or supporting frame II, and the arms 23, pivoted to the said brackets and the said 20 block.

The grinding block 20, is preferably made of a natural stone, but a very satisfactory block can be made artificially of cement and crushed granite. The bottom surface of the block 20, 25 is concave so as to flt neatly over the top of the roller M. The rear lower edge 24, of the block is slightly flared in order to allow the mixture to reach the grinding surface without the nip at that point acting as a scraper.

I provide the block 20, with upright posts 25, over which removable weights l9, can be placed. The posts 25, are set near the sides of the block 20, and by either increasing or decreasing the weights placed thereon, the texture of the 35 finished product is easily controlled, and the natural wear of both the roller I4, and the block 20, is evenly distributed. I further provide the block 20, with handles 26, to enable the operator to raise or lower the said block when it becomes necessary to do so for cleaning.

Through the approximate center of the block 20, I imbed or affix a shaft 21. This shaft preferably a steel rod, is made parallel to the concave surface of the block 20, and extends outwardly from its sides for a short distance. Four removable collars 33, are affixed to the shaft by set screws 34. Two collars are placed on each end of the shaft and one on each side of an arm 50 23.

I also imbed in the block 20, water pipes 23, to which are attached an inlet hose 29, and an outlet hose 30, for cooling the grinding surface of the block 20. The water lines can be easily connected to the main water pipes ll, of the mill.

folding brackets 39a, in the raised or alternate of which is flared, the said block having a shaft 2 aoea'rso The arms 22, have an adjustable coupling at actual grinding surface of the roller l4, and by their ends for engaging the shafts 21, 01 the block supplementing the efl'ectiveness of the grinding 20. The arms 23, have longitudinal slots 3|, horinip between the rollers II and I4, I correspondzontally through their sides and adjusting screws ingly increase the efllciency of the mill, and I also 8|. Within each of the slots 2|, I insert a comterial in the same or in other machines in order pression spring 35, a lug 36. and a slidable cap 31, to obtain a finished product. which engages the end of the adjusting screws 32, It is quite obvious also that a second auxiliary fying the removal of the block 20, from the rest of uch changes in form, construction and propor- 15 1mm)! m grinding surface at all times regardless ing from the essence of the invention or the scope of the lateral movement of the rollers ll. f the f ll i claim.

For the purpose of retaining the arms 23, and I claim as my invention; the block 20, in a raised position I equip the brack- In a mm of the class described an ahhmm 20 which in themselves are well known. The Figure in g frame, a rectilinear grinding block having shows the position 0f the arm and the a longitudinal concave grinding surface the nip posmon' extending therethrough and projecting outward- With the construction I have described it is 1y from its Sides parallel t the concave grinding ossible f m or repair the grinding surface, water pipes for cooling the said block block 20, with very little trouble. All that is necimbedded therein posts mounted on the top of the apparatus is, first, to remove whatever weights brackets mounted on the Sam frame arms 30 may be thereon; Second loosen set Screws tached to the ends of the said shaft and pivotally and the that the sprmg and connected to the said brackets, holders pivoted the lug 36, will come out of the slot 3|. The block t t d ar for supporting the said block in 20, and the shafts 21, can then be moved and a raised Simon, and handles attached t t shifted sidewise and upward until the shafts are said blockpgor raising the same 0 he out of their respective slots.

With my auxiliary grinder, by increasing the GEORGE SCHILLING. 

